tomcat waffle-filter with auth-constraint

I started with a clean tomcat 6 and got the waffle-filter example running with waffle-version 1.4 beta.

After that I tried to add a contraint that only authenticated users from our domain are allowed to access the site (e.g.
NT-AUTORITÄT\Diese Organisation (S-1-5-15) ).It seems that there is a small missing link in my understanding to achieve this.

In addition to the provided waffle-filter sample I added the security lines to the web.xml of the waffle-filter-application. The web.xml now looks like this:

I added some lines to the jsp-page which print out the list of user-roles like in the waffle-filter sample:

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<%@page import="java.security.Principal" %>
<%@page import="waffle.apache.GenericWindowsPrincipal" %>
<%@page import="waffle.windows.auth.WindowsAccount" %>
<%
if (request.getParameter("logoff") != null) {
session.invalidate();
response.sendRedirect("index.jsp");
return;
}
%>
<html><head><title>Protected Page for Examples</title></head><bodybgcolor="white">
You are logged in as remote user <b><%= request.getRemoteUser() %></b> in session <b><%= session.getId() %></b>.<br><br><br>
<%
if (request.getUserPrincipal() != null) {
%>
Your user principal name is <b><%= request.getUserPrincipal().getName() %></b>.
<br><br>
<%
} else {
%>
No user principal could be identified.
<br><br>
<%
}
%>
<%
String role = request.getParameter("role");
if (role == null)
role = "";
if (role.length() > 0) {
if (request.isUserInRole(role)) {
%>
You have been granted role <b><%= role %></b>.
<br><br>
<%
} else {
%>
You have <i>not</i> been granted role <b><%= role %></b>.
<br><br>
<%
}
}
%>
To check whether your username has been granted a particular role, enter it here:
<formmethod="GET"action='<%= response.encodeURL("index.jsp") %>'><inputtype="text"name="role"value="<%= role %>"></form><br><br>
You can logoff by clicking
<ahref='<%= response.encodeURL("index.jsp?logoff=true") %>'>here</a>.
This should cause automatic re-logon with Waffle and a new session ID.
<br><br>
All user groups:
<ul>
<%
Principal principal = request.getUserPrincipal();
if (principal instanceof GenericWindowsPrincipal) {
GenericWindowsPrincipal genericWindowsPrincipal = (GenericWindowsPrincipal) principal;
for(WindowsAccount account : genericWindowsPrincipal.getGroups().values()) {
%>
<li><%= account.getFqn() %> (<%= account.getSidString() %>)
<%
}
}
%>
</ul></body></html>